Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a cobertura do relé 5kw do dyfj-tv?
 ###Tabelas: CREATE TABLE rjtv_stations_nationwide_2nd_avenue (rjtv_stations_nationwide_2nd_avenue_id AUTO_INCREMENT PRIMARY KEY, Branding VARCHAR, Callsign VARCHAR, Ch. # VARCHAR, Power (kW) VARCHAR, Station Type VARCHAR, Coverage (Transmitter site) VARCHAR) CREATE TABLE satellite_television (satellite_television_id AUTO_INCREMENT PRIMARY KEY, Channel INT, Name VARCHAR, Language VARCHAR, Owner VARCHAR, Group VARCHAR, Type VARCHAR) CREATE TABLE orthologs (orthologs_id AUTO_INCREMENT PRIMARY KEY, Species VARCHAR, Common Name VARCHAR, Protein Name VARCHAR, Accession Number VARCHAR, NT Length VARCHAR, NT Identity VARCHAR, AA Length VARCHAR, AA Identity VARCHAR, E-Value VARCHAR) CREATE TABLE awards_ceremonies (awards_ceremonies_id AUTO_INCREMENT PRIMARY KEY, Ceremony VARCHAR, Date VARCHAR, Host(s) VARCHAR, Venue VARCHAR, Film of the Year VARCHAR) CREATE TABLE end-of-season_managerial_changes (end-of-season_managerial_changes_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Club VARCHAR, Date of departure VARCHAR, Replacement VARCHAR, Date of appointment VARCHAR)  
SELECT Coverage (Transmitter site) FROM rjtv_stations_nationwide_2nd_avenue WHERE Station Type = Relay AND Power (kW) = 5kW AND Callsign = DYFJ-TV